Bug#1055845: matplotlib: Build-Depends on python3-xarray which is not in testing

[Graham Inggs]

Source: matplotlib
Version: 3.6.3-1
Severity: serious
Tags: ftbfs

Hi Maintainer

matplotlib has a build-dependency on python3-xarray which is no longer
in testing.

Please drop this build-dependency or help get python3-xarray back into testing.

Regards
Graham